An inflatable head for a hydraulic pile hammer
By designing an inflatable head for hydraulic pile hammers, the existing nitrogen charging tool has been solved for complex structure, difficult operation and easy damage to the wrench, efficient and safe filling and deflation operations are achieved, and maintenance and replacement processes are simplified.
Patent Information
- Application Number
- CN202421624560.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-10
- Publication Date
- 2025-04-08
- Estimated Expiration
- 2034-07-10
AI Technical Summary
The existing hydraulic pile hammer nitrogen filling tools have complex structures, difficult to disassemble and assemble, and difficult to operate. The manufacturing cost of the hexagonal wrench is high and easy to damage.
An inflatable head for hydraulic pile hammers is designed, including core rods, handwheels, rotors, housings and wrenches. Through the optimization of structural design, safe filling and deflation of high-pressure nitrogen is achieved, and operation and maintenance are simplified.
The charging and deflation requirements of the two sealing structures inside and outside the hydraulic pile hammer accumulator are realized, ensuring that there is no leakage of nitrogen during the charging and deflation process, simple operation and labor-saving, the wrench structure can be replaced, and the inflatable head has the advantages of simple structure and easy disassembly and assembly.
Smart Images
Figure CN222731813U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of inflation equipment components, in particular to an inflation head for a hydraulic pile hammer. Background Art
[0002] In the prior art, a number of high-pressure and low-pressure accumulators are installed inside the hammer body of a hydraulic pile hammer, which are respectively connected to the high-pressure oil inlet and low-pressure oil return lines of the hydraulic system. The internal pressure of the high-pressure and low-pressure accumulators matches the oil inlet and return pressure settings of the hydraulic system. If the pressure is too high or too low, it will affect the entire hydraulic system, and further affect the normal use of the hydraulic pile hammer. Therefore, a nitrogen charging tool is required that can be applied to the hydraulic pile hammer hammer body charging structure, meet the charging requirements of the high-pressure and low-pressure accumulators, and can regularly replenish the accumulators.
[0003] The existing nitrogen charging tools for hydraulic pile hammers have the following problems:
[0004] 1. The existing inflatable tooling has a complex structure, is difficult to disassemble and assemble, is not conducive to maintenance, and is not conducive to replacing seals;
[0005] 2. Difficult operation. When the inflation port needs to be closed after inflation, the handle has a large resistance to twisting due to the internal air pressure, making it difficult to close the air inlet.
[0006] 3. The hexagonal wrench in the inflatable tooling has a high manufacturing cost, is easily damaged after long-term use, and is difficult to replace. Utility Model Content
[0007] In order to solve the above technical problems, the purpose of the utility model is to provide an inflator head for a hydraulic pile hammer.
[0008] The technical solution adopted by the utility model is: an inflation head for a hydraulic pile hammer, comprising a core rod, one end of the core rod is connected to a handle, and the other end passes through a hand wheel and a mounting hole on a rotary rod in sequence and is connected to a wrench, the rotary rod is sleeved on the core rod, one end of the rotary rod is cooperatively mounted in the inner hole of the hand wheel, and the rotary rod is driven to rotate by turning the hand wheel, the other end of the rotary rod is provided with a threaded section that can be screwed into the threaded hole of the hammer body, a shell with an air inlet a is sleeved on the outer circumferential surface of the rotary rod, an annular air cavity b is formed between the rotary rod and the shell, an annular air cavity c is formed between the core rod and the rotary rod, and an annular air cavity d is formed inside the core rod, the core rod and the wrench are driven to move and the accumulator inflation port is opened by rotating the handle, and high-pressure gas enters the accumulator inflation port through the air inlet a, the annular air cavity b, the annular air cavity c and the annular air cavity d in sequence.
[0009] As a preferred solution, an open fixing ring is provided on the core rod between the hand wheel and the handle to prevent the core rod from axial movement.
[0010] As a preferred solution, the core rod has a step surface, and a thrust washer is arranged between the step surface and the contact portion of the rotating rod.
[0011] As a preferred solution, the thrust washer is made of a self-lubricating material with a low friction coefficient.
[0012] As a preferred embodiment, a clamping ring is provided between the lower end of the core rod and the inner cavity of the rotating rod. The clamping ring is a two-half structure, which is respectively clamped on the ring groove at the outer end of the core rod and inserted into the inner cavity of the rotating rod to form an integrated structure with the core rod. The inner surface of the clamping ring and the gap between the core rod and the wrench constitute an airflow channel.
[0013] As a preferred solution, a first sealing ring is provided on the rotating matching surfaces of the rotating rod and the core rod.
[0014] As a preferred solution, an inner hole is provided on the lower end surface of the core rod, the upper end of the wrench is fitted in the inner hole of the core rod and rotates synchronously with the core rod, and a spring for automatically resetting the wrench is also provided in the inner hole of the core rod.
[0015] As a preferred solution, the wrench consists of an insert and a wrench head. One end of the wrench head is inserted into the inner hole of the insert and connected into an integrated structure by interference fit.
[0016] As a preferred solution, the shell is rotatably mounted on the outer circumference of the rotary rod, and the interference between the joint installed at the air inlet a and the hammer can be avoided by rotating the shell.
[0017] As a preferred solution, a second sealing ring is provided on the rotating matching surface between the rotating rod and the housing, and a third sealing ring is provided on the contact surface between the rotating rod and the hammer body.
[0018] The beneficial effects of the utility model are:
[0019] Based on the defects of the prior art, this solution provides an inflator head for a hydraulic pile hammer, which can achieve the following technical effects by optimizing the structural design:
[0020] Firstly, it can realize the filling and deflation requirements of the two sealing structures inside and outside the hydraulic pile hammer accumulator, ensuring that there is no leakage of nitrogen in the accumulator during the filling and deflation process.
[0021] Second, the operation is simple and labor-saving. During the inflation process, the handle can be easily twisted to transmit torque and close the air inlet of the accumulator, ignoring the influence of the internal high-pressure nitrogen;
[0022] Thirdly, the designed wrench structure can be replaced at any time after being damaged, which saves time and effort and does not affect the secondary use. At the same time, the inflation head also has the advantages of simple structure and convenient disassembly and assembly. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0024] Figure 1 It is a structural sectional view of the utility model;
[0025] Figure 2 for Figure 1 The structural diagram of the middle wrench;
[0026] Figure 3 It is a schematic diagram of the structure of the utility model in a specific use state.
[0027] Figure numerals: 1. handle; 2. open fixing ring; 3. core rod; 4. handwheel; 5. rotating rod; 6. housing; 7. spring; 8. wrench; 8-1. insert, 8-2. wrench head, 9. retaining ring; 10. first sealing ring; 11. thrust washer; 12. second sealing ring; 13. third sealing ring; 14. hammer body, 15. inflation port screw, 16. accumulator. DETAILED DESCRIPTION
[0028] The present invention is described in detail below by way of exemplary embodiments. However, it should be understood that, without further description, elements, structures and features in one embodiment may also be beneficially combined in other embodiments.
[0029] It should be noted that: unless otherwise defined, the technical terms or scientific terms used in this document shall have the usual meanings understood by persons with ordinary skills in the field to which the utility model belongs; the words "one", "an" or "the" and the like used in the specification and claims of the utility model patent application do not express quantity restrictions, but indicate the existence of at least one; the words "first", "second" and "third" used in this document shall not be regarded as restrictions on the order of components, but are only used to distinguish different components; the words "include" or "comprise" and the like indicate that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, but do not exclude other elements or objects with the same function;
[0030] Embodiment 1
[0031] In order to more clearly describe the specific structure and working process of the inflation head for hydraulic pile hammer, Figure 1-3 Describe this embodiment:
[0032] As shown in the figure, an air charging head for a hydraulic pile hammer is mainly composed of the following components, namely a handle 1, an open fixing ring 2, a core rod 3, a hand wheel 4, a rotary rod 5, a housing 6 and a wrench 8, wherein one end of the core rod 3 is connected to the handle 1, and the other end is connected to the wrench 8 after passing through the mounting holes on the hand wheel 4 and the rotary rod 5 in turn. The handle 1 is turned to transmit torque to the wrench 8 through the core rod 3 to drive the wrench 8 to rotate, and the air charging port screw 15 inside the hammer body 14 is turned. The rotary rod 5 is rotatably sleeved on the core rod 3, and one end of the rotary rod 5 is cooperatively installed in the inner hole of the hand wheel 4. The torque is transmitted to the rotary rod 5 by turning the hand wheel, so that the threaded section at the other end of the rotary rod 5 rotates Inserted into the threaded hole of the hammer body 14 to complete the sealed docking of the inflation head and the hammer body, a shell 6 with an air inlet a is sleeved on the outer circumferential surface of the rotary rod 5, an annular air cavity b is formed between the rotary rod 5 and the shell 6, an annular air cavity c is formed between the core rod 3 and the rotary rod 5, and an annular air cavity d is formed inside the core rod 3, wherein the air inlet a, the annular air cavity b, the annular air cavity c and the annular air cavity d are interconnected; after the inflation head is connected to the hammer body, the end of the wrench 8 is correspondingly inserted into the inflation port screw 15, the handle 1 is turned to drive the core rod 3 and the wrench 8 to rotate to open the accumulator inflation port, and the high-pressure nitrogen enters the accumulator inflation port through the air inlet a, the annular air cavity b, the annular air cavity c and the annular air cavity d in turn.
[0033] In this embodiment, the inner cavity at the lower end of the core rod 3 is an inner hexagonal hole, the lower outer end is provided with a ring groove, and the outer circle is provided with a through hole as an air flow channel; the wrench 8 is divided into two parts: an insert 14 and a wrench head 15. The outer end of the insert 14 is an outer hexagonal hole, and the inner hole is an inner hexagonal hole. The wrench head 15 is an outer hexagonal long rod. One end of the wrench head 15 is inserted into the inner hole of the insert 14 and connected into an integral structure by an interference fit. After the wrench head 15 passes through the insert 14 and is welded on the top, the outer hexagonal part of the insert 14 is embedded in the inner hole at the lower end of the core rod 3.
[0034] In this embodiment, an open fixing ring 2 is located between the handwheel 4 and the handle 1, and is provided on the core rod 3 to prevent the core rod from axially moving. The open fixing ring 2 is open at one end and is tightened with screws at the other end to form a circular ring, which is used to be fixed on the top of the core rod 3 to prevent the core rod 3 from axially moving. The core rod 3 has a step surface, and a thrust washer 11 is provided between the step surface and the contact portion of the rotating rod 5. The thrust washer 11 is made of a self-lubricating material with a very low friction coefficient, which can reduce the friction resistance of the contact portion between the core rod 3 and the rotating rod 5 when the core rod 3 is rotated, making the operation flexible and labor-saving.
[0035] In this embodiment, a clamping ring 9 is further provided between the lower end of the core rod 3 and the inner cavity of the rotating rod 5. The clamping ring 9 is a two-half structure, which is respectively clamped on the ring groove at the outer end of the core rod 3 and inserted into the inner cavity of the rotating rod to form an integrated structure with the core rod. The inner surface of the clamping ring 9 and the gap between the core rod 3 and the wrench 8 constitute an air flow channel, and a first sealing ring 10 is provided on the rotating mating surface of the rotating rod 5 and the core rod 3.
[0036] In this embodiment, the handle 1 is inserted into the circular hole at the upper end of the core rod 3 to facilitate manual rotation of the core rod 3, thereby transmitting torque and driving the wrench 8 to rotate. A spring 7 for automatically resetting the wrench 8 is also provided in the inner hole at the lower end of the core rod 3.
[0037] In this embodiment, the outer part of the handwheel 4 adopts a knurling process to increase the friction resistance between the hand and the outer part of the handwheel, which is conducive to the transmission of torque. The inner cavity of the handwheel 4 is provided with an inner hexagonal hole; the upper end of the rotating rod 5 is an outer hexagonal shape, and the tail is provided with an external thread. The upper end of the rotating rod 5 is embedded in the inner hexagonal hole of the handwheel 4. When the handwheel 4 is rotated clockwise, the torque can be directly transmitted to the rotating rod 5, so that the threaded section at the lower part of the rotating rod 5 is screwed into the threaded hole corresponding to the hammer body.
[0038] In this embodiment, the shell 6 is rotatably mounted on the outer circumferential surface of the rotary rod 5, and the orientation of the shell 6 can be rotated to avoid interference between the joint installed at the air inlet a and the hammer body 14; a second sealing ring 12 is provided on the rotating matching surface of the rotary rod 5 and the shell 6, and a third sealing ring 13 is provided on the contact surface between the rotary rod 5 and the hammer body 14.
[0039] The installation process of the inflation head is as follows: turn the hand wheel 4 clockwise to screw the tail of the rotary rod 5 into the corresponding threaded hole of the hammer body, and realize the contact surface sealing through the third sealing ring 13. During this installation process, turn the handle 1 to drive the core rod 3 and the wrench 8 to rotate, so that the wrench head 15 of the wrench 8 is inserted into the hexagonal hole at the top of the inflation port screw, and rotate the shell 6 to adjust the installation angle of the a port to prevent the joint installed at the a port from interfering with the hammer body.
[0040] The inflation process is as follows: turn the handle 1 counterclockwise to drive the core rod 3, the wrench 8, and the inflation port screw 15 to loosen the inflation port screw 15 and open the accumulator inflation port; then open the gas source, and the high-pressure nitrogen can enter the annular air cavity b, the annular air cavity c, the annular air cavity d and the air flow channel on the retaining ring 9 from the air inlet a, and inflate the accumulator through the accumulator inflation port.
[0041] The utility model has the advantages of simple structure and convenient disassembly and assembly. After removing the open fixing ring 2, the inflation head can be completely disassembled. The disassembly sequence is as follows: remove the handle 1, remove the screws of the open fixing ring 2, remove the open fixing ring 2, move the core rod 3 downward and pull it out, and after the clamping ring 9 is removed from the ring groove at the outer end of the core rod 3, the hexagonal wrench 8 can be taken out; thereafter, the hand wheel 4 can be separated from the rotating rod 5, and the rotating rod 5 can be separated from the shell 6 in turn.
[0042] The installation sequence is the reverse of the above disassembly process.
[0043] In the utility model, the wrench 8 is divided into two parts, an insert 14 and a wrench head 15, which adopt a combined structure. The two parts are made of different materials and can be manufactured separately, which reduces the difficulty of processing. The wrench head 15 can be manufactured by intercepting an existing high-strength hexagonal tool, without the need for separate processing and manufacturing, thus saving the heat treatment process of increasing the hardness and corrosion resistance of the surface of the wrench head 15. Secondly, the wrench head 15 and the insert 14 are connected by interference fit, and welding is used at the top matching position to tighten and prevent loosening, thereby ensuring the reliability of torque transmission.
[0044] Due to the high-pressure nitrogen inside the inflation head, the core rod 3 can be subjected to a large upward axial force. Since the core rod 3 and the rotating rod 5 are in surface contact, the axial force exerted on the core rod 3 finally acts on the rotating rod 5. In this solution, the rotating rod 5 is fastened to the hammer body through a threaded section, which can withstand this axial force, so that other parts of the inflation head are no longer subjected to force, thereby ensuring the safety of the inflation head.
[0045] At the same time, a thrust washer 11 made of a self-lubricating material is added between the contact surfaces of the core rod 3 and the rotating rod 5, which can effectively reduce the friction resistance encountered by the core rod 3 when rotating, making it easier to turn the handle 1.
[0046] The parts not described in detail in the above embodiments are prior art.
[0047] It should be noted that although the utility model is described through the above embodiments, the utility model can also have other multiple embodiments. Without departing from the spirit and scope of the utility model, it is obvious that those skilled in the art can make various corresponding changes and deformations to the utility model, but these changes and deformations should all fall within the scope of protection of the attached claims of the utility model and their equivalents.
Claims
1. An inflator head for a hydraulic pile hammer, characterized in that: It includes a core rod, one end of which is connected to the handle, and the other end of which is connected to the wrench after passing through the handwheel and the mounting holes on the rotating rod in sequence. The rotating rod is sleeved on the core rod, and one end of the rotating rod is cooperated and mounted in the inner hole of the handwheel. The rotating rod is driven to rotate by turning the handwheel. The other end of the rotating rod is provided with a threaded section that can be screwed into the threaded hole of the hammer body. A shell with an air inlet a is sleeved on the outer circumferential surface of the rotating rod, an annular air cavity b is formed between the rotating rod and the shell, an annular air cavity c is formed between the core rod and the rotating rod, and an annular air cavity d is formed inside the core rod. The core rod and the wrench are driven to move and the accumulator charging port is opened by turning the handle, and high-pressure gas enters the accumulator charging port through the air inlet a, the annular air cavity b, the annular air cavity c and the annular air cavity d in sequence.
2. The inflator head for a hydraulic pile hammer according to claim 1, characterized in that: Located between the hand wheel and the handle, an open fixing ring is also provided on the core rod to prevent the core rod from axial movement.
3. The inflator head for a hydraulic pile hammer according to claim 1, characterized in that: The core rod is provided with a step surface, and a thrust washer is arranged between the step surface and the contact position of the rotating rod.
4. The inflator head for a hydraulic pile hammer according to claim 3, characterized in that: The thrust washer is made of a self-lubricating material with a low friction coefficient.
5. The inflator head for a hydraulic pile hammer according to claim 1, characterized in that: A clamping ring is also provided between the lower end of the core rod and the inner cavity of the rotating rod. The clamping ring is a two-half structure, which is respectively clamped on the ring groove at the outer end of the core rod and inserted into the inner cavity of the rotating rod to form an integrated structure with the core rod. The inner surface of the clamping ring and the gap between the core rod and the wrench constitute an airflow channel.
6. The inflator head for a hydraulic pile hammer according to claim 1, characterized in that: A first sealing ring is arranged on the rotating matching surfaces of the rotating rod and the core rod.
7. The inflator head for a hydraulic pile hammer according to claim 1, characterized in that: An inner hole is arranged on the lower end surface of the core rod, the upper end of the wrench is fitted in the inner hole of the core rod and rotates synchronously with the core rod, and a spring for automatically resetting the wrench is also arranged in the inner hole of the core rod.
8. The inflator head for a hydraulic pile hammer according to claim 1, characterized in that: The wrench is composed of an insert and a wrench head. One end of the wrench head is inserted into the inner hole of the insert and connected into an integrated structure by interference fit.
9. The inflator head for a hydraulic pile hammer according to claim 1, characterized in that: The shell is rotatably mounted on the outer circumferential surface of the rotating rod, and the interference between the joint installed at the air inlet a and the hammer body can be avoided by rotating the shell.
10. An inflator head for a hydraulic pile hammer according to claim 9, characterized in that: A second sealing ring is arranged on the rotating matching surface between the rotating rod and the housing, and a third sealing ring is arranged on the contact surface between the rotating rod and the hammer body.